Mid-wave and Long-wave IR Linear Dichroism in a Hexagonal Perovskite Chalcogenide

Abstract

Mid-wave infrared (IR) and long-wave IR spectral ranges are of growing interest in various applications such as thermal imaging, thermography-based remote sensing, and night vision. Materials widely used for IR photodetectors in this regime include cadmium mercury telluride alloys and nanostructures of compound semiconductor. The materials development for IR optics will drive down the cost of IR optical systems and enable larger scale deployment. Here, we report a mid-wave IR responsive material composed of earth abundant and non-toxic elements, Sr1+xTiS3. It has a highly anisotropic quasi-one-dimensional structure similar to hexagonal perovskites. We grew large, high quality single crystals and studied its anisotropic optical properties. We observed two distinct optical absorption edges at ~2.5 um and ~5 um, respectively, for linear polarizations along two principal axes. The material demonstrated strong and broadband linear dichroism spanning mid-wave IR and long-wave IR, with a dichroitic ratio of up to 22.

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References in corpus (6)

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Cited by in corpus (7)

• Thermal Stability Study of Transition Metal Perovskite Sulfides
• Crystal growth and structural analysis of perovskite chalcogenide BaZrS${}_3$ and Ruddlesden-Popper phase Ba${}_3$Zr${}_2$S${}_7$
• Quasi-epitaxial growth of BaTiS${}_3$ films
• Origins of chalcogenide perovskite instability
• Anisotropic Keldysh interaction
• Linear Dichroism Conversion in Quasi One-Dimensional Perovskite Chalcogenide
• Epitaxial Thin Films of a Chalcogenide Perovskite